I'm 18 and have had the depo shot before and it never gave me any problems (I was 16/17). I just got my first injection in October on the first day of my period. Well I wasn't expecting the effects to kick in so fast. I didn't get a period in november, so I was kinda worried. On top of me not having a period (which isn't really a problem), I've had cramps almost evey single day like I am about to start. And sometimes they hurt to where I don't wanna have sex with my fiancé. Is there something wrong with me? Can I get a lower dose of it or should I just switch to BCP? This never used to happen before.